#ifdef __cplusplus  /* Assume C declarations for C++ */
  extern "C" int DogAddr;
  extern "C" int DogBytes;
  extern "C" int DogCode;
  extern "C" unsigned long DogResult;
  extern "C" void * DogData;
  extern "C" {
    DWORD DogCheck (void);
    DWORD DogConvert (void);
    DWORD ReadDog (void);
    DWORD WriteDog (void);
    }
#else
  extern DWORD DogCheck (void);
  extern DWORD DogConvert (void);
  extern DWORD ReadDog (void);
  extern DWORD WriteDog (void);
#endif  /* __cplusplus */

#define MB_SUCCESS           0

#define VXD_IN_USED          0X30000   //specify for Windows 95
#define PORT_IN_USED         0X3000    //specify for Windows 95
